آموزش تصویری اتوکد دستورات دوبعدی و سه بعدی + ترفندهای اتوکد
About Parallel and Perspective Views
You can create realistic visual effects in a drawing by defining either parallel
or perspective projections of a model.
The difference between perspective views and parallel projections is that perspective
views require a distance between a theoretical camera and target point. Small distances
produce severe perspective effects; large distances produce mild effects.
A perspective view remains in effect until the perspective effect is turned off or
until a new view is defined in its place.
The following illustration shows the same model in both a parallel projection and
perspective projection. Both are based on the same viewing direction.
Define Parallel Projections
To determine the point or angle in model space, you can
- Choose a preset 3D view from the View toolbar.
- Enter a coordinate or angles that represent your viewing location in 3D.
- Change to a view of the XY plane of the current UCS, a saved UCS, or the WCS.
- Change the 3D view dynamically with your pointing device.
- Set front and back clipping planes to limit the objects being displayed.
Viewing in 3D is available only in model space. If you are working in paper space,
you cannot use 3D viewing commands such as VPOINT, DVIEW, or PLAN to define paper
space views. The view in paper space is always a plan view.
u can create realistic visual effects in a drawing by defining either parallel or perspective projections of a model. The difference between perspective views …perspective views and parallel projections is that perspective views require a distance between a theoretical camera and target point.parallel projection is a projection of an object in three-dimensional space onto a fixed plane, … Parallel projections can be seen as the limit of a central or perspective projection, in which the rays pass through …. dimetric and trimetric projection, depending on the exact angle at which the view deviates from the orthogonal.Perspective in the graphic arts is an approximate representation, generally on a flat surface … Any perspective representation of a scene that includes parallel lines has one or ….. A zero-point perspective view is equivalent to an elevation.perspective views and parallel projections is that perspective views require a distance between a theoretical camera and target point.… Parallel vs Perspective Projection Drawing is a visual art that has been used by man for self-expression throughout history. It uses pencils, pens …Parallel – distance from COP to PP infinite. Perspective vs. parallel projections. Perspective projections pros and cons: + Size varies inversely with distance – …view, clipping and perspective can be memorized independently and recalled from the user-defined list at any time. Each view retrieved in this …Parallel projection discards z-coordinate and parallel lines from each vertex on the object are extended until they intersect the view plane. In parallel … The following figure shows all the three types of perspective projection −. Three Types of …… Perspective of lines parallel to the picture plane will have no vanishing … The method of drawing perspective view by vanishing point method is …